Rigid plastic dye tube

Details Rigid plastic dye tube Rigid plastic dye tube

1997-01-09

1998-10-13

Mansen, Michael

Winding, tensioning, or guiding

Bobbin or spool

Open-work structure

24211831, 68198, B65H 7520, D06F 1700

Patent

active

058200495

ABSTRACT:
A rigid plastic dye tube. The tube includes a pair of solid end caps and an open structure between the pair of end caps to permit dye to pass through the structure. The open structure includes a plurality of rings arranged axially along the length of the tube and a plurality of rigid ribs extending between the end caps and through the plurality of rings. The open structure is closed and impermeable to dye flow adjacent to each of the end caps to prevent dye "blowout" during processing. In the preferred embodiment, the tube is formed from a homopolymer of polypropylene plastic having an ASTM D-256A notched Izod impact score of greater than or equal to 0.5 ft-lbs/inch, an ASTM D-790A flexural modulus of greater than about 200,000 psi and an ASTM D-648 heat deflection value of greater than about 200.degree. F.

REFERENCES:
patent: 3448597 (1969-06-01), Livingstone
patent: 3647156 (1972-03-01), Henning
patent: 4270710 (1981-06-01), Ono
patent: 4491286 (1985-01-01), Nielsen
patent: 4519557 (1985-05-01), Newman
patent: 4632332 (1986-12-01), Newman
patent: 4702433 (1987-10-01), Gilljam et al.

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